I forget the geneology of this thread, but what was wrong with storing the data in a session? ----- Original Message ----- From: "Charlie Reiman" <creiman@kefta.com> To: <kthangavelu@earthlink.net>; <zope@zope.org> Sent: Friday, August 16, 2002 12:34 PM Subject: RE: [Zope] Persistence Problem
Thanks everyone. This dawned on me as I was on the train riding home. I also found __setstate__ and __getstate__ if I want to mess with the loading hooks (I don't).
http://www.zopelabs.com/cookbook/1002251996
The Zope Developer's guide does talk about module variables. But all it says is:
"Objects stored in modules but not in the ZODB are not persistent and not-thread safe. In general it's not a good idea to store data (as opposed to functions, and class definitions) in modules when using ZODB."
This is not helpful, as there are times when this level of storage is exactly what you want. This paragraph reads as a "Just don't do this," paragraph rather than a "You can do this, here's why you'd want to and what pitfalls to avoid," paragraph. I've seen the same trick in exUserFolder (although I did not understand why it did that until yesterday).
Also, the dev guide makes no mention of _v_ attributes be thread/connection specific, which is a dangerous oversight, IMHO.
I've made the appropriate comments to the dev guide online. Thanks for everyone's help.
Charlie.
-----Original Message----- From: kapil thangavelu [mailto:kthangavelu@earthlink.net] Sent: Thursday, August 15, 2002 7:43 PM To: Charlie Reiman; zope@zope.org Subject: Re: [Zope] Persistence Problem
as andy mentioned, _v_ volatile attributes are specific to a thread (well, technically there specific to the underlying zodb connection). they remain only as long as the object remains in memory/cache.
.......
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